Seal section with internal lubricant pump for electrical submersible well pump
US10082150B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2016 |
| Grant date | Sep 25, 2018 |
| Priority date | — |
| Expiry date | Dec 15, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/102
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A well pump assembly has a submersible well fluid pump, motor, and seal section with a seal section shaft for transferring rotation of a motor drive shaft to a pump drive shaft. The seal section has a shaft passage through which the seal section shaft extends. A movable compensating element has an interior containing motor lubricant that is in fluid communication with motor lubricant in the motor and also in fluid communication with motor lubricant in the shaft passage. A shaft seal restricts well fluid from entry into the shaft passage. A lubricant pump driven by the shaft has a discharge within the shaft passage below the shaft seal. A recirculation passage extends from the shaft passage at a point between the discharge of the lubricant pump and the shaft seal to the interior of the compensating element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.